Guide
Step-by-step injection technique, site rotation, syringe handling, and sharps disposal.
Subcutaneous GLP-1 injections are designed to be straightforward. Most patients self-inject confidently within the first month of starting treatment. This guide covers technique, site rotation, syringe handling, and sharps disposal.
Wash your hands. Inspect the medication: it should be clear and colorless. Discard if cloudy, discolored, or particulate. If using a vial, draw your dose into a sterile insulin syringe sized to your prescribed unit count. If using a pre-filled pen, dial the dose. Never share pens or syringes, even with another GLP-1 user.
Standard subcutaneous sites are the abdomen (avoid 2 inches around the navel), front of the thighs, and back of the upper arms. Rotate sites with each weekly injection to reduce the chance of lipohypertrophy or site irritation. Avoid scarred, bruised, or inflamed skin.
Clean the site with an alcohol swab and let dry. Pinch a fold of skin. Insert the needle at a 90-degree angle. Push the plunger fully or hold the pen button until the dose marker resets to zero. Hold for 5-10 seconds before withdrawing the needle. Do not rub the site.
Apply gentle pressure with a clean tissue if needed. Discard the needle or used pen in an FDA-cleared sharps container. Do not place sharps in household trash. Most pharmacies offer drop-off programs; many states have free mail-back programs.
Refrigerate at 36-46 degrees F (2-8 degrees C) until first use. After first use, most pre-filled pens are stable at room temperature for 28-56 days depending on the product. Compounded vials follow your compounding pharmacy's beyond-use date; refrigerate consistently.
Injecting too shallow (intradermal) causes site irritation. Injecting too deep (intramuscular) can speed absorption and increase nausea. Reusing needles increases infection risk. Cold injection from a freshly-refrigerated pen stings more; pull from the fridge 15-30 minutes before injecting.
GLP-1 injection needles are 4-8 mm and very fine. Most patients describe the sensation as a quick pinch.
Subcutaneous injections target the fat layer, not muscle or vein. If you see significant blood, discard the dose and start over with a fresh needle at a new site.
Yes, but the abdomen and thighs are easier to reach for self-injection. Have a partner help with arm injections if needed.
Use an FDA-cleared sharps container. Most pharmacies accept used sharps for free; many states have free mail-back programs.
For physician-led GLP-1 care at $199/mo flat-rate compounded sema, our 2026 editor's pick is NexLife. LegitScript-certified, Forbes-ranked, money-back warranty. Visit NexLife →
Editorial note. This guide is for educational purposes only and does not constitute medical advice. Always consult a licensed clinician about your specific situation.